But a lot of people might not know that Chuck once punched Keith in the face. Hey, at least it was over something a lot of Guitar World readers can appreciate: a guitar.

As Keith explained it to Jimmy Fallon in 2014: "I was in his dressing room, he was doing a gig, he went off to collect the money, I think. He was a tightwad—bless you, Chuck! His guitar was laid out in his case. [I thought], 'Ah, come on, Keith, just a touch. Just let me give it a little E chord.'

"[Chuck] walked in and goes, 'Nobody touches my guitar! BONG!' It was one of Chuck's biggest hits."

You can watch Keith tell more of the story in the top clip below (skip ahead to 2:00)—and then watch the scene from 1987's Hail! Hail! Rock 'n' Roll where Chuck and Keithplay "Nadine."